Final answer:
Tissues are groups of cells with a common structure and function, working together to perform a physiological function.
Step-by-step explanation:
Tissues are defined as a group of cells that are arranged in a specific manner to support a common physiological function. This makes the correct answer option 2) A group of cells arranged in a specific manner to support a common physiological function. These cells share a common structure and function and are usually derived from the same embryonic origin. Tissues are integral in complex organisms and are organized into organs, each performing specific functions vital for the organism's life processes.